Railhead's INCREDIBIT® drill head is named for its ability to bore and steer through tough, rocky conditions.

Its patented technology allows contractors to accomplish bores in ground that can not be drilled with conventional bits.

And, it allows smaller machines to drill through some conditions that would otherwise require a mud motor. It is truly a multipurpose bit that steers through soft conditions as well as rock and cobble.

How the Incredibit® works

The INCREDIBIT® bores in an entirely different manner than any other bit. Rather than using simple abrasion, the INCREDIBIT® fractures rock in a random elliptical pattern. It "dances" in the hole, allowing the INCREDIBIT® to be productive in all kinds of soils and formations. Because of the "dancing" effect, the INCREDIBIT® bores a larger hole than conventional bits. In most conditions, a 2 ¾" bit will cut approximately a 4" hole, a 3" bit will cut approximately a 5" hole, a 3 ½" bit will cut approximately a 6" hole, and a 4 1/8" bit will cut approximately an 8" hole.

DRILLING
The drilling technique used with the INCREDIBIT¨ is similar to a flat bill bit in softer formations, however, when drilling in harder formations it is important to not force the bit, but let it drill at it's own pace.
Apply steady pressure. We recommend starting with 500 pounds of forward thrust and increase pressure as needed based on the conditions of the bore site. Rotational torque may also start at 500 pounds. Simply allow the bit to work while maintaining enough pressure to accomplish the job.

STEERING
Steering in soft formations is similar to steering with a flat bill - turn and push. Steering in harder formations requires more technique.

The best method to use is to push into the rock and cut over to create a relief, pull back, rotate, and do it again.
If you wanted to go to 12 o'clock - you would push in at 10 and rotate over to 2 while applying heavy force. Repeat this action as many times as necessary to carve in about one foot, then check your pitch. Continue until the desired pitch has been reached. This is the only time we recommend increased pressure. Use only enough force to score the rock and create a relief.

Drilling in different formations requires varying your drilling techniques. The most common problem you will encounter is layered formations. It is difficult to steer when the layers are running at the same or at a close angle to the pitch you are trying to achieve. Generally there is a spot somewhere in the layer that you can catch and turn. Where that is - is anybody's guess.
The key is to be patient and continue to cut and rake until you find it. Sometimes you can pull back, find another angle of attack, then come back up with more pitch to get enough angle. Most holes are saved because of the operator and his familiarity with the machine and the bit.

Replacable Teeth

Rock teeth play an important role in getting the most productivity out of your INCREDIBIT®. As the teeth come in contact with rock, the combination of torque and pressure create cracks in the rock and force small pieces of rock to break away. Generally speaking, sharp pointed teeth are more effective in softer conditions and rounded teeth are more effective in harder conditions.

The chart shows which teeth are the most effective for general drilling and hard drilling conditions. However, these recommendations may not work in all situations.

The INCREDIBIT® sonde housing is manufactured from the finest alloy steel available which virtually eliminates over-flexing, bending, or cracking.

Tri-lock Door
The patented Tri-Lock side load housing door is tooled from pre-hardened steel, and offers strength and durability along with security to keep your valuable transmitter in the housing.

Electronics Friendly
The INCREDIBIT® housing is designed with sonde blocks which absorb vibration and save wear on your sonde's locating keyway. This system holds the sonde securely in the housing which results in less vibration, a more reliable signal, and increased battery life.

Repairable
The INCREDIBIT® sonde housing was developed with repairability in mind. The sonde housings are assembled with a main body and a housing saver. If the threads on the housing saver get damaged, the housing saver can be replaced without having to replace the entire sonde housing.